代码

public function upload_firstsure() {try {// 检查是否有文件上传if (!isset($_FILES['file']) || !is_uploaded_file($_FILES['file']['tmp_name'])) {throw new \Exception('未接收到文件或文件上传失败');}// 获取上传的文件$uploaded_file = $_FILES['file']['tmp_name'];$file_true_name = $_FILES['file']['name'];// 获取当前日期$current_date = date("Ymd");// 动态创建文件夹$user_path = $_SERVER['DOCUMENT_ROOT'] . "/uploads/firstsure/{$current_date}/";if (!file_exists($user_path)) {if (!mkdir($user_path, 0777, true)) {throw new \Exception('创建文件夹失败');}}// 生成随机文件名$random_number = mt_rand(1000000000000000, 9999999999999999); // 随机生成16位数字$new_file_name = $current_date . '_' . $random_number . '.' . pathinfo($file_true_name, PATHINFO_EXTENSION);// 文件保存路径$move_to_file = $user_path . "/" . $new_file_name;// 调用压缩图片的方法if (!$this->compress_image($uploaded_file, $move_to_file)) {throw new \Exception('压缩或保存图片失败');}// 返回成功结果return json(['code' => 1,'msg' => '上传成功','file_path' => "uploads/firstsure/{$current_date}/" . $new_file_name]);} catch (\Exception $e) {// 返回失败结果return json(['code' => 0,'msg' => $e->getMessage()]);}
}
private function compress_image($source_path, $destination_path) {try {// 设置最大文件大小为300KB$max_size = 307200;// 设置最小和最大质量$min_quality = 10;$max_quality = 90;// 获取图像信息list($width, $height, $type) = getimagesize($source_path);if (!$width || !$height) {throw new \Exception('无法获取图片信息');}// 创建图像资源switch ($type) {case IMAGETYPE_JPEG:$image = imagecreatefromjpeg($source_path);break;case IMAGETYPE_PNG:$image = imagecreatefrompng($source_path);break;case IMAGETYPE_GIF:$image = imagecreatefromgif($source_path);break;default:throw new \Exception('不支持的图片格式');}// 初始化质量$quality = $max_quality;do {// 如果是PNG或GIF，我们不调整质量if ($type == IMAGETYPE_PNG || $type == IMAGETYPE_GIF) {$success = ($type == IMAGETYPE_PNG) ? imagepng($image, $destination_path) : imagegif($image, $destination_path);$file_size = filesize($destination_path);break;}// 压缩JPEG图片并保存$success = imagejpeg($image, $destination_path, $quality);// 检查文件大小$file_size = filesize($destination_path);// 如果文件太大且质量还能降低，则降低质量再次尝试if ($file_size > $max_size && $quality > $min_quality) {$quality -= 5; // 每次减少5个点的质量以更精细地控制unlink($destination_path); // 删除之前生成的过大的图片} else {break;}} while ($quality >= $min_quality);// 清除内存中的图像资源imagedestroy($image);// 返回成功状态return $success;} catch (\Exception $e) {// 记录错误日志（可选）error_log('压缩图片失败: ' . $e->getMessage());return false;}
}

 参考

 php上传参考php：实现压缩文件上传、解压、文件更名、压缩包删除功能_php上传压缩包并解压-CSDN博客https://blog.csdn.net/weixin_46001736/article/details/137605254?ops_request_misc=%257B%2522request%255Fid%2522%253A%25226ef920c24b1af44aaa9a421047266de2%2522%252C%2522scm%2522%253A%252220140713.130102334.pc%255Fblog.%2522%257D&request_id=6ef920c24b1af44aaa9a421047266de2&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~blog~first_rank_ecpm_v1~rank_v31_ecpm-1-137605254-null-null.nonecase&utm_term=%E6%96%87%E4%BB%B6&spm=1018.2226.3001.4450